Chuck.



. CHUCK.

APPLICATION FILED IuNE 6. 1914A Patented Sept. 28, 1915.

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E. UHLIG & K. BAUCH.

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APPucATlo'N FILED JUNE s. m14.

1,1 54,898. Patented Sept. `28, 1915.

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narran sr? r El/ZNST UHLIG'IAND KURT BAUCH,

OF GERA-UNTERMHAUS,

CHUCK. i

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Application filed J une S,

To all/whom t may concern.'

Be it known that we, llLRNsr UHLiG'and I KURT BAUCH, citizens of theGerman Empire, both residing at Gcra-Untermhaus, in Germany, haveinvented certain new and .useful Improvements in Chucks, of which thefollowing is a specification.

This invention relates to chucks, more especially for lathes, drilling,milling and similarmachine tools, of the type in which toothed jaws meshwith a spiral thread. on

f onef face 'of a disk which ,is turned by means of bevel wheels mountedradially around the chuck body and meshing with bevel teeth on the otherface of the disk.

The invention consists in improvements in the meurt-'ting andv holdingof the bevel wheels, and also in part to improvements in theconstruction of the said wheels, resulting in increased strength andstability of the chuck mechanism, improved wear, absence or reduction ofnoise, andsimplicity of construction..

The invention is illustrated in the accompanying drawings, in which-Figure l is a front view, partly in section y of one orinof the improvedchuck, with the cover removed. Fig. 2 is a view of the opposite sideofthe chuck, to a smaller scale. Fig. 3 is a cross section of thechuck,'and Fig. 4 showsa detail thereof. Fig. 5' is a front view ofanother form of the improved chuck, partly in section. Fig. 6'is asection 'on the line A-B of Fig. 5, and I4`ig. 7y is a detail view ofthering.

` "Referring inthe first instance tothe construction shown in Figs. l to4, the boss a. of

' the chuck and the outer part bof the chuck fknown manner.

housingareconnected by, and integral'with,

mohntedradially in the chuck housing, and' can be turned by a keyinserted from the circumference ofthe housing.

The teeth ofthe bevel wheels' gradually merge with cylirdrical journalsf1 by means of which thlwhelsare mounted in bores g fof the hou.s ing,.'fthe journals "being-0f .the

Specification of Letters Patent. Efjfv-gtd @cept 2S, 1915,

1914. Serial No.

same diameter as the vwheels at their bases.

As theteeth of 'the bevel wheels are subjected to thegreatest stressesat their outer ends, the gradual `merging of the teeth kinto thejournals eiiectively prevents the teeth from breaking olf. The bevelwheels are provided at their inner ends with gudgeons la., which work inbores z' in the boss a, the bores i and g formingl the bearings for Vthewheels. The latter are thus carried at each 'end in a bearing formed in-a massive part,-

. that is to say, having no gaps orapertures. The bearings consequentlywear well, and being formed in the same body` they permanent'l'y retaintheir positions in relation to each other.

Mounted -on the peripheryof the boss a is a ring c provided with slotsfm.' The bevel wheels f are provided with necks n, which are engagedwith the slots m in the ring4 la,

andthe latter abutting against the shoulders atthe ends vor' the necks,prevents axial displacementof the bevel wheels. The ring k, which .isprevented by the boss a. from moving laterally, may with advantage bemade of steel instead of cast iron, the housing being generally made ofthe latter materiahh steel ring is able to take the axial thrust ofthebevel wheels without appreciable Wear. The ring c thus also assistsin providing a good permanent bearing and guide for the bevel wheels,thereby preventing chattering vot the latter. The ring k is held inposition by a cover plate or ange o, which is screwed .on the end of theboss and. holds the Aring evenly against the toothed face of the disk d.Theplate o its at-its periphery in the chuck housing, which isprovidedon its rear face with a recess t adapted to engage vover theflange on the lathe or the like.

In the. construction shown in Figs; 5to 7, the jaws designated e1,radially movable in the housing b1, are actuated in the same way bymeans of bevel wheels fzand a disk d1.'

The inner journals or necks n? ot the'b'evel wheels work, as before, inslots in a ring, designated k1, surrounding the boss al', but theseslots, designated m1 have continuations m2, at right angles thereto, sothat a bayonet joint slot is formed. After inserting the ring cl, theysame is rotated so that the slots m2 are engaged with the necks-11.1 ofthe bevel wheels, the ring being then held in position againstaxialfmovement by the necks, l

`so that 'Ting 'and the' beyel ,wheels hold sub1-atleta?irsitieei Q l l1,154,898

ter. AThe, flange k2 bevel wheels,

The ring /c has a'lange 7a2 which lits into the chuck housing, therebyclosing the latis locked to the chuck housing by screws screwed intotapped. holes s in the ring and housing, one half of each tapped holebeing in the ring and the other in the-housing, and the said screws mayalso serve to fasten the chuck to the flange on the spindle of the latheor the like. The flange k2 'is also rovided with holes r for theinsertion of a liey for turning the ring.

What we claim as .our invention and desire to secure by Letters Patentof the United States is 1. -In a chuck the combination ofa housinghaving a cylindrical wall and a tubular boss within said wall, thelatter having radial bores, jaws radially movable -in said housing, gearwheels mounted in said radial bores yhaving necks, means in said housingconnecting said wheels to said jaws, for radial movement of the latter,and a detachable slotted ring Htting around said tubular,

boss, partly embracing the necks of said gear wheels with its slots,thereby retaining said Wheels in said bores.

2. In a chuck the combination of a housing having a cylindrical wall anda tubular boss within said wall, the latter having radial bores, toothedjaws radially movable in said housing, bevel wheels mounted in saidvradial bores having necks, -a rotatable disk in said housing having aspiral thread on one face, engaging said toothed jaws, and bevel teethon the other face, engaging said whereby said jawsV can be radiallymoved, and a detachable slotted ring fitting/around said tubular boss,partly embracing 'the necks of said bevel wheels with its slots, therebyretaining'said wheels in said bores.

3. In a chuck the combination of a housing having a cylindrical wall anda tubular boss within said wall, the latter having radial bores and theboss having recesses in its outer circumference, toothed jaws radiallymovable in said housing, bevel wheels mounted in said radialbores,.having necks,

and gudgeons on said necks entering said re- -and gudgeons on said necksl recesses, a rotatable dlsk in said housing,

cesses, a rotatable disk in said housing, having a spiral thread on oneface, engaging said toothedY jaws and bevel teeth on its other faceengaging said bevel wheels, whereby said jaws can be radially moved, andai detachable slotted ring litting around said tubular boss, partlyembracing vsaid necks with its slots and movement of said wheels.

4. In a chuck the combination of a housing having a cylindrical wall anda tubular boss within said wall, the latter having radial bores, jawsradially movable in said housing, gear wheels mounted in said radialbores'having necks, means in said housing connecting said wheels to saidjaws, for radial movement of the latter, a detachable having a spiralthread on one face, engaging said toothed jaws and bevel teeth on itsother face engaging said bevel wheels,

whereby said jaws can be radially moved;

and a detachable ring fitting around said tubular boss, having slotswhereby it enga-ges 'said necks and -makes a bayonet joint therewith. f

In witness whereof we have s1gned this specification in the presence oftwo wit-` IIGSSBS.

ERNST UHLIe. KURT BAUcH.

` Witnesses:

JULIUS SCHNABEL, CHARLEs NEUER.

preventing axial

